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|1. (WO2018123466) OPTICAL BODY, DIFFUSION PLATE, DISPLAY DEVICE, PROJECTION DEVICE, AND ILLUMINATION DEVICE|
|Title:||OPTICAL BODY, DIFFUSION PLATE, DISPLAY DEVICE, PROJECTION DEVICE, AND ILLUMINATION DEVICE|
[Problem] To suppress the occurrence of periodic optical characteristics in a structural unit larger than an aperiodic structure in an optical body in which a microlens array serving as the aperiodic structure is arrayed and expanded in a wide area. [Solution] This optical body is a single or an aggregated plurality of aperiodic structure regions constituted by a single lens group comprising a plurality of single lenses. In the aperiodic structure region, the arrangement state of the single lens group is aperiodic as a whole, and the ratio of the size of the aperiodic structure region to the average aperture diameter of the single lens in the aperiodic structure region is 25 times or more.